21021010122 has 32 divisors (see below), whose sum is σ = 49704854400. Its totient is φ = 5798899008.

The previous prime is 21021010121. The next prime is 21021010123. The reversal of 21021010122 is 22101012012.

It is an interprime number because it is at equal distance from previous prime (21021010121) and next prime (21021010123).

It is a junction number, because it is equal to n+sod(n) for n = 21021010098 and 21021010107.

It is not an unprimeable number, because it can be changed into a prime (21021010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8628097 + ... + 8630532.

It is an arithmetic number, because the mean of its divisors is an integer number (1553276700).

Almost surely, 2^21021010122 is an apocalyptic number.

21021010122 is an abundant number, since it is smaller than the sum of its proper divisors (28683844278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021010122 is a wasteful number, since it uses less digits than its factorization.

21021010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17258670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21021010122 its reverse (22101012012), we get a palindrome (43122022134).

The spelling of 21021010122 in words is "twenty-one billion, twenty-one million, ten thousand, one hundred twenty-two".